i.MX8M Mini Core0/Core1 Software Reset Issue - Core Hangs

sirishaB — Mon, 14 Oct 2024 08:45:05 GMT

Hi,

I'm working with the i.MX8M Mini processor and trying to perform a software reset of Core0 and Core1. I have implemented the following approach where I set the reset vector using the SRC General Purpose Register (GPR) and then trigger a core reset using the A53 register. However, after resetting Core0 (or Core1), the core enters a hang state and doesn't resume properly.

Here’s a summary of what I did:

Set Core0 Reset Vector: I wrote the high and low parts of the reset vector to the SRC_GPR1 and SRC_GPR2 registers.

Trigger Core0 Reset: I used the SRC_A53RCR0 register to trigger a software reset of Core0.

void trigger_core0_reset(void) {

#define SRC_A53RCR0_ADDR 0x30390004 // Address of SRC_A53RCR0

#define CORE0_RESET (1 << 0) // Bit 0 for Core0 software reset

volatile uint32_t *src_a53rcr0 = (uint32_t *)SRC_A53RCR0_ADDR;

*src_a53rcr0 |= CORE0_RESET; // Trigger Core0 software reset

}

I called the functions with:

set_core0_reset_vector(0x7E1000); // Example reset vector address

trigger_core0_reset();

Issue: After resetting Core0, it appears to enter a hang state and does not recover. I also tried this approach for Core1 with the same result — the core hangs after the reset.

I would appreciate any help or insights into why the cores are hanging and what might be missing in my approach.

Thank you in advance!

i.MX Processors中的主题 i.MX8M Mini Core0/Core1 Software Reset Issue - Core Hangs

i.MX8M Mini Core0/Core1 Software Reset Issue - Core Hangs